与传统的PKI相比，IBC在诸如密钥生成、分发、管理等方面有着明显的优势。使用基于身份的密码系统，可以有效的减少计算量和存储量。-PKI, compared with the traditional, IBC such as key generation, distribution, and management has a clear advantage. The use of identity-based password system, can effectively reduce the computation and storage.